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Original file line number	Diff line number	Diff line change
`@@ -1308,6 +1308,9 @@ remove_redundant_deadstore(basicblock *bb)`
`1308`	`1308`	`{`
`1309`	`1309`	`for (inti=bb->b_iused-1;i >=0;i--) {`
`1310`	`1310`	`cfg_instr*inst=&bb->b_instr[i];`
	`1311`	`+// Optimize only if the opcode is STORE_FAST and the lineno is same.`
	`1312`	`+// The number of STORE_FAST will be decreased if the optimization is success.`
	`1313`	`+// So most of case could be skipped.`
`1311`	`1314`	`if (inst->i_opcode==STORE_FAST) {`
`1312`	`1315`	`for (intj=i-1;j >=0;j--) {`
`1313`	`1316`	`cfg_instr*prev=&bb->b_instr[j];`

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